Take-up mechanism for sewing-machines.



Patented July 30, IBM. F. L. ALLEY. TAKE-UP MECHANISM FOR SEWINGMACHINES.

(Application filed Aug. 8, 1896.)

(No Model.)

THE numus PETERS ca, Pnwaumou wAsumarom n. c.

UNirnn STATES PATNT OFFICE.

FREDERICK L. ALLEY, OF LYNN, MASSACHUSETTS.

TAKE-UP MECHANISM FOR SEWING-=IVIACHINES.

SPECIFICATION forming part Of Letters Patent N0. 679,409, dated July 30,1901. Application filed August 6, 1896. Serial No. 601,932. (No model.)

To all whom, it may concern:

Be it known that I, FREDERICK L. ALLEY, a citizen of the United States,residing at Lynn, in the county of Essex and State of Massach usetts,have invented certain new and useful Improvements in ShOe'SeWingMachines; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

In shoe-sewing machines it has been found to be desirable while thetake-up is giving up its thread to the shuttle duringthe operation offorming a stitch to prevent as far as practicable a retrograde movementof the needlethread, which would tend to allow the thread to becomeslackened between the take-up and the work. To secure theabove-suggested result, it has heretofore been proposed in the art toprovide what has been termed an auxiliary take-up, which acts upon thethread between the take-up proper and the supply end, as shown, forexample, in United States Patent to O. Dancel, No. 366,935, dated July19, 1887, also in patent to French and Meyer, No. 412,703, dated October8, 1889, alsoin patent to same inventors,No. 473,870, dated April 26,1892.

The device above noted has been found to be unsatisfactory in operationin that the auxiliary take-up not acting directly upon the needle-threadbut being arranged to act upon the thread back of the take-up in orderto take up any slack in the needle-thread must necessarily render thethread around the roll of the take-up proper and generally around one ormore thread-guides, rendering its operation slow and for many types ofmachine ineffectual.

The present invention has for its object to provide an auxiliary take-upwhich is arranged to act upon the thread between the take-up proper andthe work; and to the above end the present invention consists of thedevices and combinations of devices hereinafter more specifically setforth and claimed.

A preferred form of the present invention is illustrated in theaccompanying drawings, in which Figure 1 is a side view of a shoe-sewingmachine, showing the present invention applied thereto. Fig. 2 is anenlarged side view of the take-up proper and auxiliary take-up; and Fig.3 is a front view of the same, partially in section.

Similar letters and figures of reference refer to similar parts in allthe views.

In the drawings, T is the backrest, S is the back gage, E is the looper,His the needle, P is the awl, A is the channel-guide, D is the take-up,and (Z the take-up lever, allof which parts, except as hereinafternoted, together with their actuating mechanism, may be of any usual orconvenient construction and form no part of the present invention.

As shown in the drawings, the parts above referred to are substantiallysimilar in form and arrangement to corresponding parts of the machinenow known in the trade as the Goodyear lock-stitch welt-machine andembodying the in vention of Christian Dancel.

In accordance with the present invention I provide an auxiliary take-up10, which acts upon the thread 12 between the take-up D and the work toprevent a retrograde movement of the needle-thread while the take-upproper is giving its thread to the shuttle.

As shown in the drawings, the auxiliary take-up 10 comprises an arm 2,which is pivotally connected at one end to the take-up lever cl and atits free end carries the threadroll, which forms the roll of theauxiliary take-up 10. In practice I find it convenient to extend thetrunnion d, which supports the roll of the take-up D upon itsactuating-lever d, to form a bearing for the arm 2, which is held inplace thereon by a bolt 3 and washer 4; or other suitable means.

The above-described arrangement is such that the auxiliary take-up 10has a swinging motion with the take-up D and also independently thereofabout the trunnion d as an axis.

To limit the swinging movement of the auxiliary take-up 10 about thetrunnion d, I find it preferable to provide on the take-up lever cl oran extension (1 thereof a stop 5, which is adapted to come in contactwith the arm 2 and a lateral extension 6 thereon, the arrangement beingsuch that the auxiliary take-up 10 can swing in one direction about thetrunnion (1 until the arm 2 strikes the stop 5, and

in an opposite direction until the lateral extension of the arm 2strikes the stop 5. To

render the swinging movement of the take-up 1O adjustable in extent, Ifind it convenient to provide in the lateral extension 6 of the arm 2 athreaded bearing, which receives a correspondingly-threaded bolt 7, theinner end of which is adapted to strike the stop 5. The swingingmovement of the auxiliary take-up 10, which I have hereinbeforedescribed as oocuring when'the take-up D is giving thread to theshuttle, is preferably secured by means of a suitably-placed spring 8,which acts to swing the auxiliary take-up 10 about the trunnion d as anaxis until the slack in the needle-thread between the tension and thework has been taken up or until the extension 6 of the arm 2 or the bolt7 strikes the stop 5, and which yields to allow the auxiliary take-up 10to give up its thread to take-up D until the arm 2 comes in contact withthe stop 5. As shown in the drawings, the spring 8 consists of a coiledspring, one end of which is conveniently secured to the trunnion d bymeans of the bolt 3 and washer 4, and the other end of which bearsagainst a suitable stop near the free end of the arm 2, said stop beingin practice formed by an extension of the trunnion 9, which supports theauxiliary take-up roll through the arm 2, the spring 8 projecting undera nut 20, which clamps it against the arm 2, holding it firmly inposition.

In the machine of the drawings the lead of the thread 12 is from thewax-pot (not shown) around the tension-wheel 14, thence over the roll15, thence over the roll of take-up D, thence over the roll 16, thenceover the roll of the auxiliary take-u p 10, and from the auxiliarytake-u p 10 direct to the looper E, needle H, and work.

The operation of the machine of the drawings is as follows: While thetake-up D is being raised by its lever 01 to set the stitch the spring 8is contracted to allow the arm 2 to bear against the stop 5 and theauxiliary takeup 10 to yield its thread to the take-up D, so

that at the limit of the upward movement of lever d the parts are insubstantially the relative position shown in dotted lines in Fig. 1.When the take-up D has set the stitch and the lever d begins itsdownward movement to allow the take-up D to give thread to the shuttleas fast as any slack is developed in the needle-thread, the spring 8expands and swings the auxiliary take-up 10 about the trunnion d untilsuch slack is taken up or until the bolt 7 strikes the stop 5, so thatat the limit of the downward movement of lever 01 the parts are in theposition indicated by the full lines in Fig. 1 or in an intermediateposition, depending upon the amount of slack developed in theneedle-thread.

Having thus described my invention and its mode of operation, I desireto say that I do not consider my present invention limited to thespecific form and arrangement thereof hereinbefore described; but

I claim as novel and desire to secure by Letters Patent of the UnitedStates-- 1. A take-np mechanism for sewing-machines, having, incombination, a main takeup,its actuating-lever and a spring-controlledauxiliary take-up pivotally mounted on the actuating-leverof the maintake-up in position to engage the thread between the needle and maintake-up, substantially as described.

2. A take-up mechanism for sewing-machines, having, in combination, amain takeup, its actuating-lever, a spring-controlled auxiliary take-upcarried by said lever, and a stationary thread-truck located to engagethe thread between the main and auxiliary take-ups, substantially asdescribed.

In testimony whereof I atfix my signature in presence of two Witnesses.

- FREDERICK L. ALLEY.

Witnesses:

JOSEPH WARREN, HARTLEY F. A'rwoon.

